[PATCH v3 0/2] arm64/acpi: restrict AML opregion memory access

Ard Biesheuvel ardb at kernel.org
Fri Jun 26 11:58:30 EDT 2020

- do a more elaborate check on the region, against the EFI memory map

- split into two patches
- fallback to __ioremap() for ACPI reclaim memory, in case it is not covered
  by the linear mapping (e.g., when booting a kdump kernel)

Ard Biesheuvel (2):
  arm64/acpi: disallow AML memory opregions to access kernel memory
  arm64/acpi: disallow writeable AML opregion mapping for EFI code

 arch/arm64/include/asm/acpi.h | 15 +---
 arch/arm64/kernel/acpi.c      | 75 ++++++++++++++++++++
 2 files changed, 76 insertions(+), 14 deletions(-)


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